Iwahiro's Apparently Impossible Cube is an example of a coordinate motion puzzle - all the pieces have to be moved into place at the same time. You can find the original at http://puzzlewillbeplayed.com/444/IwahiroAIC/1/

Print of 2 of each piece at a fine resolution. I used a layer height of 0.2 mm from a 0.3 mm nozzle. The pieces have been designed with a small bevel on the edges and a slight offset to give a snug fit (but this may vary on your printer). You can watch a video of the puzzle in action (including the solution, so don't watch it if you want to try and solve it yourself) at http://www.youtube.com/watch?v=1J8fA3t3Y78